dating conundrum

Ok, really need some help! I'm single with 4 kids, only 2 little oned live with me at present. I've been single for ages, getting on with life. Met a guy over a year ago when I was not looking for one, had several dates, then lost touch. One year on, we are back in touch, have had 2 dates in the past week, and I really like him, am at a different place in my life and we have another date set up. Problem... back when I first met him, I told him I had 2 children, the youngest 2! Why? I don't know!! I'm judged alot for being what people consider too young to have 4 kids, although I'm over that now, I was particularly sensitive back then. So, I respect this guy and just wabt him to know the truth, then whatever happens, happens! How do I tell him?!